Fresh blood in stool with abdominal pain, consider the following diseases, commonly hemorrhoids, anal fissure, colorectal polyps, ulcerative colorectitis. If the patient is over 40 years of age, also consider low-grade colorectal cancer, as colorectal cancer patients with a low-grade location may also have fresh blood in the stool with abdominal pain. Less common in China are diseases such as Crohn’s disease, colonic vascular malformation, diverticulitis, and isolated rectal ulcers. In such cases, it is important to go to a regular hospital for appropriate tests to clarify the cause and proceed to the next step in treatment. A colonoscopy should be done, and most of these diseases can be diagnosed.